/*
 * Copyright (c) 2012, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/*
 *  ======== TimerSupport.c ========
 */

#include <xdc/std.h>
#include <xdc/runtime/Error.h>
#include <xdc/runtime/Startup.h>

#include <ti/sysbios/family/c64p/Hwi.h>

#include "package/internal/TimerSupport.xdc.h"

#define PWRSAVE_LOCKVAL     0x0F0A0B00 /* Unlock the PowerSave hardware */
#define PWRSAVE_LOCKREG     0x02AC0004 /* address of PowerSave Lock register */
#define PWRSAVE_ENABLE_TIMER0AND1 0x140     /* enable Timer0 and Timer1 */

/*
 *  ======== TimerSupport_enable ========
 *  This function enables power to Timers 0 and 1.
 */
Void TimerSupport_enable(UInt timerid, Error_Block *eb)
{
    volatile UInt *pwrSaveLock = (volatile UInt *)PWRSAVE_LOCKREG;
    UInt mdctl0;
    UInt key;

    /* disable interrupts */
    key = Hwi_disable();

    /* load MDCTL0 before unlocking powersave hardware */
    mdctl0 = pwrSaveLock[1];

    /* unlock Powersave hardware */
    pwrSaveLock[0] = PWRSAVE_LOCKVAL;

    /* enable timer 0 and 1 */
    pwrSaveLock[1] = mdctl0 | PWRSAVE_ENABLE_TIMER0AND1;

    Hwi_restore(key);
}


